Dcs Operation; Dcs Search Scanning - Yaesu FT-817ND Operating Manual

T
RANSMITTER

DCS Operation

Another form of tone access control is Digital Code Squelch, or DCS. It is a newer, more
advanced tone system that is less susceptible to false triggering than CTCSS. A DCS En-
coder/Decoder is built into your transceiver, and operation is very similar to that described
above for CTCSS.
1. Set the desired DCS code via Menu #23 (DCS CODE).
2. Press the key momentarily, then rotate the
Function Row 4 [ RPT, REV, TON ] appears on the display.
( TON ) key three times to activate the DCS Encoder/Decoder (the "
3. Press the
icon will appear on the display). The receiver will remain muted until a matching DCS
code is received on an incoming signal.
( TON ) key once to cancel DCS operation (the "
4. Press the
In operating situations where you don't know the DCS code being used by another
station, you can command the radio to listen to the incoming signal and scan in search
of the code being used.
To scan for the DCS code in use:
1. Press the
ating Function Row 12 [ TCH, DCH ] appears on the display.
2. Press the
will appear on the display) and start scanning for the incoming DCS code.
3. When the radio detects the correct code, it will halt on that code, and audio will
be allowed to pass.
4. Press and hold in the
be stored as the "current" code, so it may be used for memory storage purposes,
and you may now exit to normal operation.
36
O
PERATION
FM T
DSC Search Scanning
key momentarily, then rotate the
( DCH ) key to activate DCS Encoder/Decoder; (the "
(DCH) key for one second; the DCS code detected will
RANSMISSION
knob, as needed, until Operating
FT-817
" icon will disappear).
knob, as needed, until Oper-
Operating Manual
"
" icon